I have a 4 year old residential central ac system-with coolant leak problems-recently repaired.
My question-line set- small diameter copper pipe- should this pipe be hot to the touch (can't keep fingers on it) at condenser or should it be just warm when running? The reason I ask is that I have central AC at work (vintage 1970) and one pipe is VERY hot.
Are newer residential units different or do I still have a problem with repaired system? THANKS